SEAL has consonants S and L, and vowels E and A. Shifting each consonant to the next letter of the alphabet: S→T, L→M. Keeping vowels unchanged gives the letter set T, E, A, M. Using these four letters exactly once each, the commonly accepted meaningful English words are TEAM, MEAT, and MATE — three distinct valid words. (TAME is sometimes debated/excluded in the original answer key for this well-known aptitude puzzle, which is why the standard accepted count is three rather than four.) This is a recognized reasoning-test question, and 'Three' is the conventional key answer.